Retired FBI agent unpacks clues for solving Nancy Guthrie's disappearance

19 days into the search for Nancy Guthrie, the Pima County Sheriff confirmed that investigators are still analyzing the DNA recovered from Guthrie's home. Jonathan Vigliotti has more. 19 days into the search for Nancy Guthrie, the Pima County Sheriff confirmed that investigators are still analyzing the DNA recovered from Guthrie's home. Jonathan Vigliotti has more.